I agree with GrumpyGord about out and back trips. However, i've found that the return trip is faster, probably because I've consumed over half the food in my pack. In other words, if it took 2 1/2 days to get in, I usually can come back out in 2. I remember one trip in which I'd planned 1 1/2 days for the last stretch, figuring I'd get to the trailhead in early afternoon of the second day. About halfway through day 1, an apple I'd left in the ice chest in my car started calling me! Instead of camping a few miles short of the trailhead, I went on back to the car and camped at the trailhead, it being too late to drive into town and find a motel. Despite the fact that it was warm and a bit mushy, that apple tasted wonderful!